Keep both elbows tucked close to the sides of the torso throughout the entire animation. The upper arms remain almost completely stationary. Only the forearms perform the motion. Use short, compact vertical forearm pumps. Increase the pumping frequency by approximately 20% while keeping the movement smooth and natural. The motion should feel relaxed, effortless and rhythmic rather than mechanical. Each movement flows naturally into the next with no abrupt stops. Add subtle natural variation to the timing and spacing so the movement looks human instead of perfectly repetitive. Keep the shoulders relaxed with only minimal movement. The torso remains almost completely still. Preserve the original choreography and rhythm while making the arm motion slightly faster, smoother and more lifelike.
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